Abstract
In the previous study it was shown that sulfated poly (ethylene terephthalate) fiber has good deep dyeing properties for cationic dyes at normal pressure.In the present study an attempt was made to treat poly (ethylene paraoxybenzoate) (PEB) fiber with sulfuric acid as in the case of PET fiber, in order to give it good dyeing properties with cationic dyes at normal pressure.The dyeing mechanism of cationic dyes on sulfated fibers was also studied. Cationic dye seems to combine with acid groups which contain sulphur atoms and to a part of carboxyl groups which is made by hydrolysis with sulfuric acid.The fiber thus prepared has good dyeing properties and fastness to light and washing though the tensile strength of the fiber is not so good as in the case of PET fibers.
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